CN113489324A - Software control method and system for interleaved parallel Boost circuit - Google Patents
Software control method and system for interleaved parallel Boost circuit Download PDFInfo
- Publication number
- CN113489324A CN113489324A CN202110772577.4A CN202110772577A CN113489324A CN 113489324 A CN113489324 A CN 113489324A CN 202110772577 A CN202110772577 A CN 202110772577A CN 113489324 A CN113489324 A CN 113489324A
- Authority
- CN
- China
- Prior art keywords
- dcdc
- module
- slave
- host
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
Abstract
The invention relates to a software control method and system for a staggered parallel Boost circuit. The method comprises the following steps: initializing a host DCDC controller and a plurality of slave DCDC controllers which are output in parallel, performing CAN communication between the host DCDC controller and the slave DCDC controllers after the initialization is successful, starting the operation of the hydrogen fuel cell stack, and electrifying the host DCDC converter and the slave DCDC converters to start the operation of charging the lithium battery. And the host DCDC controller receives the charging parameters of the whole vehicle control module and reads the electrical parameters of the host DCDC module and the slave DCDC module. And the host DCDC controller adjusts the output voltage, the input current and the temperature of the host DCDC module and the slave DCDC module according to the read electrical parameters, judges the damage fault information of the DCDC module in real time and performs current sharing setting on the host DCDC module and the slave DCDC module. By the method and the device, the problems of non-uniform current caused by hardware difference among the DCDC modules and uncontrollable battery electric pile caused by damage of the DCDC modules can be solved.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a software control method and system for a staggered parallel Boost circuit.
Background
The current situation of energy structure in China, which is the first major country of energy consumption, is mainly that fossil fuel resources in China are deficient and the yield of petroleum is limited, so that the demand of daily industrial production and life on energy needs to be met by means of a large number of petroleum imports every year. Petroleum, a fossil fuel, has not been able to meet the increasing demand for energy from the development of global economy after long-term development and utilization by humans. Compared with the deficiency of fossil fuel, the electric power resources in China are relatively rich, so that the new energy industry develops a trend of future industrial development in China. With the rapid development of new energy technologies, electric vehicles become a trend of automobile industry development in China and even in the future, and the safety and reliability of electric vehicle parts are particularly critical.
The high-power DCDC module is used as an important component of the electric automobile. The device has the function of converting voltage and current, and has important influence on the service life of main components such as a battery. Most of the high-power DCDC modules in the market adopt the technology that a plurality of DCDC modules are connected in parallel in a staggered mode after receiving the control current and voltage of the BMS, and the DCDC modules process current flow equalization by themselves. However, when a plurality of DCDC modules are connected in parallel, the DCDC modules are heated due to uneven flow among the DCDC modules, the output voltage vibrates, and the DCDC modules are easily damaged. Meanwhile, time delay easily occurs between the DCDC modules in the prior art, the current of one DCDC module is too large easily during the process of adjusting the voltage and the current between the DCDC modules, the DCDC module continuously adjusts the current, the temperature of one DCDC module is too high easily during the adjustment process, the power requirement of a vehicle can not be met at full power, and the risk of damage of the DCDC module is more likely to occur.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a software control method and a software control system for a staggered parallel Boost circuit, and solves the problems that when a plurality of DCDC modules are connected in parallel in a staggered parallel mode, the DCDC modules are heated due to uneven current among the DCDC modules, the output voltage vibrates, and the DCDC modules are easy to damage.
The purpose of the invention is realized by the following technical scheme:
a software control method for an interleaved parallel Boost circuit comprises the following steps:
(1) initializing a host DCDC controller and a plurality of slave DCDC controllers which are output in parallel, carrying out CAN communication between the host DCDC controller and the slave DCDC controllers after the initialization is successful, and starting the hydrogen fuel cell stack to work;
(2) after the hydrogen fuel cell stack starts to work, the host DCDC converter and the slave DCDC converter are electrified to start to work, and a lithium battery is charged;
(3) after the lithium battery starts to be charged, the host DCDC controller receives the charging parameters of the whole vehicle control module and reads the electrical parameters of the host DCDC module and the slave DCDC module;
(4) the host DCDC controller adjusts output voltage, input current and temperature of the host DCDC module and the slave DCDC module according to the read electrical parameters, and meanwhile, the host DCDC controller judges damage fault information of the DCDC module in real time and performs current sharing setting on the host DCDC module and the slave DCDC module;
(5) after charging is completed, the DCDC host controller uploads DCDC module damage fault information to the whole vehicle control module, and the damaged DCDC module is replaced in time.
Further, the step (1) is specifically as follows:
a, a vehicle control module acquires information of a lithium battery in real time, and when the lithium battery needs to be charged, the vehicle control module generates a working instruction and sends the working instruction to a hydrogen fuel cell stack and a host DCDC controller;
b, after receiving the working instruction, the hydrogen fuel cell stack carries out self-checking, if the self-checking is successful, a preparation working instruction is generated, and the preparation working instruction is sent to a whole vehicle control module;
c, after receiving the working instruction, the host DCDC controller confirms the working state of the host DCDC module, receives the working state instruction of the slave DCDC module sent by the slave DCDC controller, generates a preparation working instruction, sends the preparation working instruction to the whole vehicle control module, and completes initialization of the host DCDC controller and the plurality of slave DCDC controllers;
and 1, d, after the vehicle control module receives a preparation work instruction sent by the hydrogen fuel cell stack and the host DCDC controller, starting charging and starting the hydrogen fuel cell stack to work.
Further, the step (2) is specifically as follows:
a, after the hydrogen fuel cell stack starts to work, the host DCDC controller receives an input current instruction and an output voltage instruction issued by a whole vehicle control module, sets the PWM current sharing size according to the number of the host DCDC module and the slave DCDC module, and generates a confirmation setting instruction;
b, the slave DCDC controller receives the PWM current sharing size and the confirmation setting instruction sent by the master DCDC controller through CAN communication, prepares to adjust, generates a preparation adjusting instruction, and sends the preparation adjusting instruction to the master DCDC controller for confirmation;
c, after the host DCDC controller confirms, the host DCDC controller distributes the received output voltage instruction to the slave DCDC controller, and the host DCDC converter and the slave DCDC converter start to output rated voltage to charge the lithium battery;
and 2, d, after the lithium battery is stably charged, the whole vehicle control module starts to send rated input current to the host DCDC controller, and the host DCDC controller distributes the issued rated input current to the slave DCDC controller.
Further, the step (3) is specifically as follows:
after the host DCDC converter and the slave DCDC converter are electrified and start to work, the host DCDC controller receives the charging parameters of the whole vehicle control module and reads the electrical parameters of the host DCDC module; and the slave DCDC controller reads the electrical parameters of the slave DCDC module and reports the electrical parameters to the master DCDC controller.
Further, the specific steps of adjusting the output voltages of the master DCDC module and the slave DCDC module in the step (4) are as follows:
when the host DCDC controller detects that the output voltages of the host DCDC module and the slave DCDC module reported by the slave DCDC controller are not equal, the host DCDC controller sends an adjusting instruction to the slave DCDC controller; and the slave DCDC controller adjusts the output voltage of the slave DCDC module in real time according to the received adjusting instruction.
Further, the specific steps of adjusting the input currents of the master DCDC module and the slave DCDC module in the step (4) are as follows:
the host DCDC controller judges the magnitude of the input current of the slave DCDC module through CAN communication, and when the input currents of the host DCDC module and the slave DCDC module are not equal, the host DCDC controller adjusts the input current parameters in real time according to the input current issued by the whole vehicle control module, redistributes the input power, and enables the input currents of the host DCDC converter and the slave DCDC converter to be equal.
Further, in the step (4), the specific step of adjusting the temperatures of the master DCDC module and the slave DCDC module includes:
the master DCDC temperature module and the slave DCDC temperature module respectively detect the temperature of the master DCDC module and the slave DCDC module in real time; the host DCDC controller samples the working temperature of the host DCDC module and the slave DCDC module in real time; when the temperature difference between the master DCDC module and the slave DCDC module is large, the master DCDC controller adjusts the PWM value of the input current in real time, increases the input current of the DCDC module with low temperature, and reduces the input current of the DCDC module with high temperature.
Further, in the step (4), the host DCDC controller determines the DCDC module damage fault information in real time, and the specific steps are as follows:
the host DCDC controller judges whether a damaged module appears in the slave DCDC modules according to the current required by the whole vehicle control module, and when the damaged module appears in the slave DCDC modules, the host DCDC controller sends a shutdown instruction to the damaged slave DCDC modules and sends the current-sharing PWM (pulse width modulation) to the slave DCDC controllers which are not damaged; when the master DCDC module is damaged, the master DCDC controller sends an instruction to a designated slave DCDC controller, and the slave DCDC controller receiving the instruction serves as the master DCDC controller.
A software control system of a staggered parallel Boost circuit comprises a hydrogen fuel cell stack, a whole vehicle control module, a lithium battery, a host DCDC module and a plurality of slave DCDC modules; the whole vehicle control module is electrically connected with the host DCDC module, the hydrogen fuel cell stack and the lithium battery through a Boost circuit; the master DCDC module and the plurality of slave DCDC modules are connected in parallel between the hydrogen fuel cell stack and the lithium battery.
Further, the master DCDC module comprises a master DCDC controller, a master DCDC converter and a master DCDC temperature module, and the slave DCDC module comprises a slave DCDC controller, a slave DCDC converter and a slave DCDC temperature module;
the host DCDC controller is electrically connected with the whole vehicle control module; the hydrogen fuel cell stack is electrically connected with the master DCDC controller and the slave DCDC controller respectively, and the master DCDC controller is in communication connection with the slave DCDC controller through a Controller Area Network (CAN); the host DCDC controller and the slave DCDC controller are respectively electrically connected with the lithium battery;
the host DCDC converter and the host DCDC temperature module are electrically connected between the host DCDC controller and the lithium battery in sequence; and the slave DCDC converter and the slave DCDC temperature module are electrically connected between the slave DCDC controller and the lithium battery in sequence.
The invention has the beneficial effects that:
the host DCCD module receives an input current and output voltage command sent by the whole control module through a Boost circuit, and adjusts the input current and output voltage between the DCDC modules in real time to charge the battery at rated power; the problems of sampling difference, input current non-uniform current and unstable regulation caused by hardware difference between DCDC modules are solved.
The problems that the temperature of the DCDC module is high, the output voltage vibrates and the like exist during operation of the DCDC module are solved better by adjusting the temperature between the DCDC modules in real time, stable parts are provided for an electric automobile or a fuel cell automobile, and the operation safety of the electric automobile or the fuel cell automobile is guaranteed.
The host DCDC controller judges the damage fault information of the DCDC module in real time, and can avoid the uncontrollable situation when a battery or an electric pile runs after the DCDC module is damaged in the running process.
Drawings
Fig. 1 is a schematic flow chart of a software control method of an interleaved parallel Boost circuit according to the present invention.
Fig. 2 is a schematic diagram of a charging process of the software control system of the interleaved parallel Boost circuit according to the present invention.
Fig. 3 is a schematic structural diagram of a software control system of an interleaved parallel Boost circuit according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
The first embodiment is as follows:
as shown in fig. 1, the present invention provides a software control method of an interleaved parallel Boost circuit,
(1) and initializing the host DCDC controller and the plurality of slave DCDC controllers which are output in parallel, and performing CAN communication between the host DCDC controller and the slave DCDC controllers after the initialization is successful so as to realize real-time information transmission. The whole vehicle control module acquires information of the lithium battery in real time, generates a working instruction when the lithium battery needs to be charged, and sends the working instruction to the hydrogen fuel cell stack and the host DCDC controller. After receiving the working instruction, the hydrogen fuel cell stack carries out self-checking, if the self-checking is successful, a preparation working instruction is generated, and the preparation working instruction is sent to a vehicle control module; after receiving the working instruction, the host DCDC controller confirms the working state of the host DCDC module, receives the working state instruction of the slave DCDC module sent by the slave DCDC controller, generates a preparation working instruction, sends the preparation working instruction to the whole vehicle control module, and completes initialization of the host DCDC controller and the plurality of slave DCDC controllers. And after the whole vehicle control module receives and confirms that the hydrogen fuel cell stack and the host DCDC controller send preparation work instructions, the charging starts, and the hydrogen fuel cell stack starts to work.
(2) After the hydrogen fuel cell stack starts to work, the host DCDC controller receives an input current instruction and an output voltage instruction issued by the whole vehicle control module, starts to perform current sharing, sets the PWM current sharing size according to the number of the host DCDC module and the slave DCDC module, and generates a confirmation setting instruction. And the slave DCDC controller receives the PWM current sharing size and the confirmation setting instruction sent by the master DCDC controller through CAN communication, prepares to adjust, generates a preparation adjusting instruction, and sends the preparation adjusting instruction to the master DCDC controller for confirmation. After the host DCDC controller confirms that the output voltage command is received, the host DCDC controller distributes the received output voltage command to the slave DCDC controller, and the host DCDC converter and the slave DCDC converter start to power on to output rated voltage to charge the lithium battery. After the lithium battery is stably charged, the whole vehicle control module starts to send rated input current to the host DCDC controller, and the host DCDC controller distributes the issued rated input current to the slave DCDC controller, so that current sharing is achieved, overcurrent inside a single DCDC module is prevented, and a protection effect is achieved. The PWM current-sharing magnitude of the input current is sent to the slave DCDC controller in real time through the master DCDC controller, and the current consistency between the master DCDC controller and the slave DCDC controller is achieved.
(3) The host DCDC converter and the slave DCDC converter are electrified to start working, and after the lithium battery is charged, the host DCDC controller receives the charging parameters of the whole vehicle control module and reads the electrical parameters such as output voltage, input current and temperature of the host DCDC module; and the slave DCDC controller reads the electrical parameters such as the output voltage, the input current, the temperature and the like of the slave DCDC module and reports the electrical parameters to the host DCDC controller.
(4) The host DCDC controller adjusts the output voltage, the input current and the temperature of the host DCDC module and the slave DCDC module according to the read electrical parameters such as the output voltage, the input current and the temperature, and meanwhile, the host DCDC controller judges the damage fault information of the DCDC module in real time and performs current sharing setting on the host DCDC module and the slave DCDC module.
When the host DCDC controller detects that the output voltages of the host DCDC module and the slave DCDC module reported by the slave DCDC controller are not equal, the host DCDC controller sends an adjusting instruction to the slave DCDC controller; and the slave DCDC controller adjusts the output voltage of the slave DCDC module in real time according to the received adjusting instruction, so that the consistency of the output voltages of the master DCDC module and the slave DCDC module is ensured, and no oscillation is generated.
The host DCDC controller judges the magnitude of the input current of the slave DCDC module through CAN communication, and when the input currents of the host DCDC module and the slave DCDC module are not equal, the host DCDC controller adjusts the input current parameters in real time according to the input current issued by the whole vehicle control module, redistributes the input power, and enables the input currents of the host DCDC converter and the slave DCDC converter to be equal; the DCDC module is prevented from being damaged due to unequal input currents between the master DCDC module and the slave DCDC module.
The master DCDC temperature module and the slave DCDC temperature module respectively detect the temperature of the master DCDC module and the slave DCDC module in real time. The host DCDC controller samples the working temperature of the host DCDC module and the slave DCDC module in real time; when the temperature difference between the master DCDC module and the slave DCDC module is large and the DCDC module is influenced, the master DCDC controller adjusts the PWM (pulse width modulation) of the input current in real time, increases the input current of the DCDC module with low temperature and reduces the input current of the DCDC module with high temperature. Therefore, the output of the master DCDC module and the slave DCDC module according to rated full power can be always kept, the safety and stability of the master DCDC module and the slave DCDC module can also be kept, the power reduction caused by high temperature of the DCDC module can be avoided, and the damage to the DCDC module caused by over-temperature can also be avoided.
And the host DCDC controller judges whether a damaged module appears in the slave DCDC modules according to the current required by the whole vehicle control module, and when the damaged module appears in the slave DCDC modules, the host DCDC controller sends a shutdown instruction to the damaged slave DCDC modules and sends the current-sharing PWM (pulse width modulation) to the slave DCDC controllers which are not damaged.
When the master DCDC module is damaged, the master DCDC controller sends an instruction to a designated slave DCDC controller, and the slave DCDC controller receiving the instruction serves as the master DCDC controller. The novel host machine DCDC controller regulates the input current and the output voltage of the DCDC module while ensuring stable output power, and ensures that a battery or an electric pile is not damaged.
(5) After charging, the DCDC host controller uploads DCDC module damage fault information to the whole vehicle control module, and the damaged DCDC module is replaced in time, so that the reliability of the DCDC module is ensured.
Example two:
as shown in fig. 2 and 3, the invention further provides a software control system of the interleaved parallel Boost circuit, which comprises a hydrogen fuel cell stack, a vehicle control module, a lithium battery, a host DCDC module and a plurality of slave DCDC modules. The whole vehicle control module is electrically connected with the host machine DCDC module, the hydrogen fuel cell stack and the lithium battery through the Boost circuit, and the host machine DCDC module and the plurality of slave machine DCDC modules are connected between the hydrogen fuel cell stack and the lithium battery in parallel.
The master DCDC module comprises a master DCDC controller, a master DCDC converter and a master DCDC temperature module, and the slave DCDC module comprises a slave DCDC controller, a slave DCDC converter and a slave DCDC temperature module.
The host DCDC controller is electrically connected with the whole vehicle control module; the hydrogen fuel cell stack is electrically connected with the host DCDC controller and the slave DCDC controller respectively, and the host DCDC controller is in communication connection with the slave DCDC controller through a CAN; the master DCDC controller and the slave DCDC controller are respectively electrically connected with the lithium battery.
The host DCDC converter and the host DCDC temperature module are electrically connected between the host DCDC controller and the lithium battery in sequence; and the slave DCDC converter and the slave DCDC temperature module are electrically connected between the slave DCDC controller and the lithium battery in sequence.
The whole vehicle control module firstly receives preparation work instructions of the hydrogen fuel cell, the machine DCDC controller and the lithium battery, then the host machine DCDC controller sends the work instructions to the hydrogen fuel cell stack, and the hydrogen fuel cell stack starts to work after receiving the work instructions and being subjected to self-checking successfully; the whole vehicle control module issues an input current and output voltage instruction to the host DCDC module through the Boost circuit, and the host DCDC module performs current sharing setting according to the number of the host DCDC module and the slave DCDC modules. After the hydrogen fuel cell stack works for a period of time and is stable, the whole vehicle control module starts to send rated input current to the host machine DCDC controller, the host machine DCDC controller distributes the rated input current to the slave machine DCDC controller according to the rated input current sent by the whole vehicle control module, the host machine DCDC controller and the slave machine DCDC module start to simultaneously adjust the same rated input current, the whole vehicle control module starts to send an output full power instruction to the host machine DCDC controller, and the host machine DCDC controller distributes the input full power current to the slave machine controller and realizes the current-sharing full power work. The lithium battery can be charged according to full power. The lithium battery is protected from being damaged due to instability when the hydrogen fuel cell stack just starts to work, and the lithium battery can be charged in an optimal mode.
The invention is used on an electric vehicle or a fuel cell vehicle, solves various conditions of high temperature, oscillation of output voltage and the like when a plurality of DCDC modules run at high power, provides stable parts for the electric vehicle or the fuel cell vehicle, and ensures the running safety of the electric vehicle or the fuel cell vehicle.
It should be understood that the above-described embodiments are merely preferred examples of the present invention and the technical principles applied thereto, and any changes, modifications, substitutions, combinations and simplifications made by those skilled in the art without departing from the spirit and principle of the present invention shall be covered by the protection scope of the present invention.
Claims (10)
1.A software control method for a staggered parallel Boost circuit is characterized by comprising the following steps:
(1) initializing a host DCDC controller and a plurality of slave DCDC controllers which are output in parallel, carrying out CAN communication between the host DCDC controller and the slave DCDC controllers after the initialization is successful, and starting the hydrogen fuel cell stack to work;
(2) after the hydrogen fuel cell stack starts to work, the host DCDC converter and the slave DCDC converter are electrified to start to work, and a lithium battery is charged;
(3) after the lithium battery starts to be charged, the host DCDC controller receives the charging parameters of the whole vehicle control module and reads the electrical parameters of the host DCDC module and the slave DCDC module;
(4) the host DCDC controller adjusts output voltage, input current and temperature of the host DCDC module and the slave DCDC module according to the read electrical parameters, and meanwhile, the host DCDC controller judges damage fault information of the DCDC module in real time and performs current sharing setting on the host DCDC module and the slave DCDC module;
(5) after charging is completed, the DCDC host controller uploads DCDC module damage fault information to the whole vehicle control module, and the damaged DCDC module is replaced in time.
2. The software control method for the interleaved parallel Boost circuit according to claim 1, wherein the step (1) is specifically as follows:
a, a vehicle control module acquires information of a lithium battery in real time, and when the lithium battery needs to be charged, the vehicle control module generates a working instruction and sends the working instruction to a hydrogen fuel cell stack and a host DCDC controller;
b, after receiving the working instruction, the hydrogen fuel cell stack carries out self-checking, if the self-checking is successful, a preparation working instruction is generated, and the preparation working instruction is sent to a whole vehicle control module;
c, after receiving the working instruction, the host DCDC controller confirms the working state of the host DCDC module, receives the working state instruction of the slave DCDC module sent by the slave DCDC controller, generates a preparation working instruction, sends the preparation working instruction to the whole vehicle control module, and completes initialization of the host DCDC controller and the plurality of slave DCDC controllers;
and 1, d, after the vehicle control module receives a preparation work instruction sent by the hydrogen fuel cell stack and the host DCDC controller, starting charging and starting the hydrogen fuel cell stack to work.
3. The software control method for the interleaved parallel Boost circuit according to claim 1, wherein the step (2) is specifically as follows:
a, after the hydrogen fuel cell stack starts to work, the host DCDC controller receives an input current instruction and an output voltage instruction issued by a whole vehicle control module, sets the PWM current sharing size according to the number of the host DCDC module and the slave DCDC module, and generates a confirmation setting instruction;
b, the slave DCDC controller receives the PWM current sharing size and the confirmation setting instruction sent by the master DCDC controller through CAN communication, prepares to adjust, generates a preparation adjusting instruction, and sends the preparation adjusting instruction to the master DCDC controller for confirmation;
c, after the host DCDC controller confirms, the host DCDC controller distributes the received output voltage instruction to the slave DCDC controller, and the host DCDC converter and the slave DCDC converter start to output rated voltage to charge the lithium battery;
and 2, d, after the lithium battery is stably charged, the whole vehicle control module starts to send rated input current to the host DCDC controller, and the host DCDC controller distributes the issued rated input current to the slave DCDC controller.
4. The software control method for the interleaved parallel Boost circuit according to claim 1, wherein the step (3) is specifically as follows:
after the host DCDC converter and the slave DCDC converter are electrified and start to work, the host DCDC controller receives the charging parameters of the whole vehicle control module and reads the electrical parameters of the host DCDC module; and the slave DCDC controller reads the electrical parameters of the slave DCDC module and reports the electrical parameters to the master DCDC controller.
5. The software control method of the interleaved parallel Boost circuit according to claim 1, wherein the step (4) of adjusting the output voltages of the master DCDC module and the slave DCDC module comprises the following specific steps:
when the host DCDC controller detects that the output voltages of the host DCDC module and the slave DCDC module reported by the slave DCDC controller are not equal, the host DCDC controller sends an adjusting instruction to the slave DCDC controller; and the slave DCDC controller adjusts the output voltage of the slave DCDC module in real time according to the received adjusting instruction.
6. The software control method of the interleaved parallel Boost circuit according to claim 1, wherein the step (4) of adjusting the input currents of the master DCDC module and the slave DCDC module comprises the following specific steps:
the host DCDC controller judges the magnitude of the input current of the slave DCDC module through CAN communication, and when the input currents of the host DCDC module and the slave DCDC module are not equal, the host DCDC controller adjusts the input current parameters in real time according to the input current issued by the whole vehicle control module, redistributes the input power, and enables the input currents of the host DCDC converter and the slave DCDC converter to be equal.
7. The software control method of the interleaved parallel Boost circuit according to claim 1, wherein in the step (4), the specific steps of adjusting the temperatures of the master DCDC module and the slave DCDC module are as follows:
the master DCDC temperature module and the slave DCDC temperature module respectively detect the temperature of the master DCDC module and the slave DCDC module in real time; the host DCDC controller samples the working temperature of the host DCDC module and the slave DCDC module in real time; when the temperature difference between the master DCDC module and the slave DCDC module is large, the master DCDC controller adjusts the PWM value of the input current in real time, increases the input current of the DCDC module with low temperature, and reduces the input current of the DCDC module with high temperature.
8. The software control method of the interleaved parallel Boost circuit according to claim 1, wherein in the step (4), the host DCDC controller judges the DCDC module damage fault information in real time, and the specific steps are as follows:
the host DCDC controller judges whether a damaged module appears in the slave DCDC modules according to the current required by the whole vehicle control module, and when the damaged module appears in the slave DCDC modules, the host DCDC controller sends a shutdown instruction to the damaged slave DCDC modules and sends the current-sharing PWM (pulse width modulation) to the slave DCDC controllers which are not damaged; when the master DCDC module is damaged, the master DCDC controller sends an instruction to a designated slave DCDC controller, and the slave DCDC controller receiving the instruction serves as the master DCDC controller.
9. A software control system of a staggered parallel Boost circuit is characterized in that: the system comprises a hydrogen fuel cell stack, a whole vehicle control module, a lithium battery, a host DCDC module and a plurality of slave DCDC modules; the whole vehicle control module is electrically connected with the host DCDC module, the hydrogen fuel cell stack and the lithium battery through a Boost circuit; the master DCDC module and the plurality of slave DCDC modules are connected in parallel between the hydrogen fuel cell stack and the lithium battery.
10. The interleaved parallel Boost circuit software control system of claim 9, wherein: the master DCDC module comprises a master DCDC controller, a master DCDC converter and a master DCDC temperature module, and the slave DCDC module comprises a slave DCDC controller, a slave DCDC converter and a slave DCDC temperature module;
the host DCDC controller is electrically connected with the whole vehicle control module; the hydrogen fuel cell stack is electrically connected with the master DCDC controller and the slave DCDC controller respectively, and the master DCDC controller is in communication connection with the slave DCDC controller through a Controller Area Network (CAN); the host DCDC controller and the slave DCDC controller are respectively electrically connected with the lithium battery;
the host DCDC converter and the host DCDC temperature module are electrically connected between the host DCDC controller and the lithium battery in sequence; and the slave DCDC converter and the slave DCDC temperature module are electrically connected between the slave DCDC controller and the lithium battery in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772577.4A CN113489324B (en) | 2021-07-08 | 2021-07-08 | Software control method and system for interleaved parallel Boost circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772577.4A CN113489324B (en) | 2021-07-08 | 2021-07-08 | Software control method and system for interleaved parallel Boost circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113489324A true CN113489324A (en) | 2021-10-08 |
| CN113489324B CN113489324B (en) | 2022-05-24 |
Family
ID=77938061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110772577.4A Active CN113489324B (en) | 2021-07-08 | 2021-07-08 | Software control method and system for interleaved parallel Boost circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113489324B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113978256A (en) * | 2021-11-10 | 2022-01-28 | 华人运通(江苏)技术有限公司 | Control method, device, equipment and storage medium for double DCDCDCDCCs of electric vehicle |
| CN114374250A (en) * | 2022-02-08 | 2022-04-19 | 东莞市美一瓦科技有限公司 | Parallel high-power boost conversion processing system and fuel cell power supply system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810908A (en) * | 2011-06-03 | 2012-12-05 | 中兴通讯股份有限公司 | Communication base station power supply parallel connection monitoring method and communication base station power supply system |
| US9385608B1 (en) * | 2013-12-21 | 2016-07-05 | Volterra Semiconductor LLC | DC-to-DC converters capable of communicating information between a slave circuit and a master controller, and associated devices and methods |
| CN106114265A (en) * | 2016-07-29 | 2016-11-16 | 武汉理工大学 | A kind of electric automobile high power DC charger/stake DCDC converting means and control method |
| CN112489404A (en) * | 2020-10-30 | 2021-03-12 | 浙江奔跑电器有限公司 | Embedded 5G communication series power supply system |
| CN112564462A (en) * | 2020-12-07 | 2021-03-26 | 矽力杰半导体技术(杭州)有限公司 | Communication control circuit applied to power supply chip |
-
2021
- 2021-07-08 CN CN202110772577.4A patent/CN113489324B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810908A (en) * | 2011-06-03 | 2012-12-05 | 中兴通讯股份有限公司 | Communication base station power supply parallel connection monitoring method and communication base station power supply system |
| US9385608B1 (en) * | 2013-12-21 | 2016-07-05 | Volterra Semiconductor LLC | DC-to-DC converters capable of communicating information between a slave circuit and a master controller, and associated devices and methods |
| CN106114265A (en) * | 2016-07-29 | 2016-11-16 | 武汉理工大学 | A kind of electric automobile high power DC charger/stake DCDC converting means and control method |
| CN112489404A (en) * | 2020-10-30 | 2021-03-12 | 浙江奔跑电器有限公司 | Embedded 5G communication series power supply system |
| CN112564462A (en) * | 2020-12-07 | 2021-03-26 | 矽力杰半导体技术(杭州)有限公司 | Communication control circuit applied to power supply chip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113978256A (en) * | 2021-11-10 | 2022-01-28 | 华人运通(江苏)技术有限公司 | Control method, device, equipment and storage medium for double DCDCDCDCCs of electric vehicle |
| CN113978256B (en) * | 2021-11-10 | 2023-10-20 | 华人运通(江苏)技术有限公司 | Control method, device and equipment for double DCDC of electric automobile and storage medium |
| CN114374250A (en) * | 2022-02-08 | 2022-04-19 | 东莞市美一瓦科技有限公司 | Parallel high-power boost conversion processing system and fuel cell power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113489324B (en) | 2022-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113489324B (en) | Software control method and system for interleaved parallel Boost circuit | |
| CN102005817B (en) | Uninterruptible power supply device based on microgrid and dispatching control method thereof | |
| CN109159720B (en) | Fuel cell and system, control method, control system and electric equipment | |
| KR20160117310A (en) | Multi-source energy storage system and energy management and control method | |
| US10491010B2 (en) | Control apparatus for controlling the charging and discharging of storage batteries through a power converter | |
| CN109066799B (en) | Micro-grid black start system and method suitable for light storage | |
| US20210313822A1 (en) | Wireless charging method and device to be charged | |
| CN105162181A (en) | Charging method and device | |
| CN112564224A (en) | System integration and control method for power battery echelon used for energy storage power station | |
| CN103904638A (en) | Direct-current distributed load system based on three-port converter and control method thereof | |
| CN112510803B (en) | Single-channel module of airplane distributed power grid structure, power generation system and control method | |
| CN111381174A (en) | Fuel cell test and lithium ion battery formation capacity-sharing coupling system and method | |
| Sousa et al. | Comparative analysis of vehicle-to-vehicle (V2V) power transfer configurations without additional power converters | |
| EP4358343A1 (en) | Photovoltaic system and control method | |
| CN105281401A (en) | Novel storage battery charging and discharging system | |
| CN102332810A (en) | High-voltage frequency converter precharging method and high-voltage frequency converter | |
| CN114725955A (en) | Electric power frequency modulation system and method for new energy station | |
| CN114944692A (en) | Energy storage and supply system and method for echelon power battery coupled super capacitor | |
| CN112583279B (en) | Control method and system suitable for bidirectional isolation type DCDC converter | |
| CN112216849B (en) | DC/DC converter current control system and method for hydrogen fuel cell system | |
| CN204615493U (en) | A kind of efficient from net type solar energy inverter | |
| KR101982123B1 (en) | System and Method for Complementary Power Control in Bipolar DC distribution system | |
| CN111404184A (en) | Fuel cell test and electric vehicle charging coupling system and control method | |
| CN104300579A (en) | Method for charging controller to have control over charging of storage battery | |
| WO2022067737A1 (en) | Charging block and charging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |